2011 Toyota Sequoia Owners Manual - Page 787

1-3. Adjustable components (seats, mirrors, steering wheel) Center third seat belt The center third seat belt is a 3-point type restraint with 2 buckles. Both seat belt buckles must be correctly located and securely latched for proper operation. Make sure that the buckle is securely latched for ready use of the center seat belt. Matches the tab with the hooked end Matches the tab with the concave end